Dave Benson K1SWL, founder of the renown Small Wonder Labs, listened to you and has designed a 40 meter version of his winning Hilltopper design. Four State QRP Group is honored to have been selected to kit the new transceiver. The Hilltopper is a high performance CW transceiver for the 40M meter band. It is the perfect solution to your portable operation needs – small, lightweight, wide 40 meter frequency coverage and low current drain, extending the life of your portable power source. The receiver is adapted from K1SWL’s SW+ Series with minor modifications. The front-end circuitry was revised to replace the now-vanished 10.7 MHz IF transformers. The receiver output is suitable for headphone use.
The transmitter strip is a proven design using three BS170 transistors for the PA. The frequency source for both transmitting and receiving is a DDS VFO employing a Si5351 PLL module. Control for the rig is provided by an Atmel ATmega328P. This runs both the frequency control and the full-featured CW keyer.
A custom silk-screened PCB enclosure is included with the kit. No drilling or cutting required!
There are two pre-installed SMT ICs on the board, but the remainder are ALL THROUGH HOLE parts, and all jacks and connectors are board mounted, the combination making this kit very easy to assemble with no external wiring needed.
This excellent random wire antenna tuner is the classic T-Match design which is known for wide matching range and smooth operation. Dave has added a nice wrinkle – the SWR indicator employs TWO leds, not the normally seen single red LED. A green one indicates output power with a red one indicating reflected power. The beauty of this arrangement is that the operator sees the output power peaking as the SWR goes down, just like a power meter with dual meters – very intuitive. This makes tuning easier and leaves no doubt that it’s tuned for maximum power output. For a high SWR the red LED is at full brightness and the green LED is off. At 2:1 both are at equal brilliance. At 1:1 the green is full on and the red is off. The small size is perfect for portable operations. Add this dandy little tuner to your portable ops go bag, or use it at home. It’s equally at home on a picnic table, in a tent or camper, as well as on the operating desk in your shack.
Specifications and Design Features
Wide tuning range: 80 meters thru 10 meters. Tested on EFHW and 100′ wire.
Maximum Power Throughput: tested at 10 Watts.
Low loss large toroid
Twelve taps for small inductance step selection.
Low insertion loss when matched.
Enclosure Size: 3″x3″x2″.
Shipped price is $51.00 (US), $55.00 (Canada), $60.00 (Outside US/Canada).
Dave Cripe designs excellent kits for the ham radio community; they’re easy to build, fun and functional. If this kit is as popular as his past kits, the first run will most likely sell out in short order.
A new kit from the Four State QRP Group and David Cripe (NM0S)
Arising from Dave’s entry in QRP ARCI’s 72 Part Challenge Design Contest in 2010, the Cyclone 40 is an enhanced version of the original design. The transceiver designed for the design contest had 72 total parts, performed well, and won honorable mention. This improved version has less than 100 components and even better performance! The kit features all through hole parts and easy assembly. The receiver is a superhet design with very good sensitivity and selectivity, and tunes the entire 125 kHZ CW segment of the 40M Band – and does so at a comfortable tuning rate. A frequency readout is included so you know where you are at all times.
This is a complete kit, including the enclosure. A high quality board package includes the pc board, front and back panels, the sides, and top and bottom all of which make up the enclosure. The control and jack labels are silk screened in white letters and vividly contrast with the black solder mask, and the holes for the connectors and controls are pre-drilled. The ends are “dovetailed” together making a very rugged, easy to build, and attractive enclosure.
Features and Specifications
Enclosure: A very nice predrilled and silkscreened enclosure is included. It’s easy to assemble and looks great.
Ergonomics: Smooth solid tuning, a quiet receiver with QSK and well behaved AGC. Nicely laid out front and rear panels.
VFO: The VFO is a simple PTO design, is very stable, and also quite easy to build
AGC: Audio derived, fast and smooth.
Frequency Range: 7.000 – 7.125 typical.
Tuning Speed: 10kHz/knob turn typical.
Stability: 300 HZ the first 5 min after power up, less than 10 HZ/hour after that.
QSK: Fantastic QSK! Full Break in, excellent muting, really fast!
All Through Hole Parts There are NO SMT parts in this kit, and only three easy to wind toroids.
Dimensions: 4.4 x 3.6 x 1.9″
Power Connector: 2.5×5.5mm coaxial, center positive. Should be fused at 1A, fast blow at PS
Antenna connector: BNC
Configuration: Superheterodyne, 11 MHZ IF, 4 Crystal IF Filter.
Sensitivity: MDS (Minimum Discernable Signal) -125, Typical, below the normal 40M band noise level.
Selectivity: Four crystal, 500 HZ IF filter
IMD3: 90 dB typical, better than most commercial gear!
IP3: +10 dBm typical – another very good number
Frequency Readout: 3 or 4 digit CW, 1 kHz or 100 Hz resolution (user selectable), developed by Adrian Hill, KCØYOI.
Band Edge Marker: A band edge marker is heard at 7.001 MHZ
Headphone Jack: 1/8″ stereo, standard earbud/Walkman® headphone compatible
DC Current consumption: 30 ma typical at 13.6 VDC.
Configuration: Stable, Wide Range VFO (PTO design), Efficient Class E Final.
Spectral Purity: All harmonics and spurs less than 50dB below the carrier.
Output Power: approximately 4W into 50 ohms
DC Current consumption: 500ma typical at 13.6 VDC Will operate down to 9v DC.
Key Jack: 1/8″ stereo, grounded shell, switching the tip keys TX. Contacts accessible for an internal add-on keyer
Kits should be available at QRP ARCI’s Four Days in May conference at Dayton, and will be for sale on the Four State QRP Group’s web site approximately May 20th. The final price hasn’t been determined yet but should be less than $100 plus shipping.
The Four State QRP Group is pleased to announce a new kit, the QRPometer, a sensitive and accurate power/swr meter designed by David Cripe, NMØS. Complete specifications, assembly manual, and ordering information can be found here ttp://www.wa0itp.com/qrpom.html
PayPal is accepted.
The range of accurate power easurement extends down to a low 100 milliwatts. This kit was conceived to fill a need within the hobby for an inexpensive, highly accurate RF power and VSWR meter for QRP power levels. With it’s large digital display it makes a very useful addition to your shack.
The QRPometer uses simple analog signal-processing circuitry to provide a set of essential measurement features not previously available in a single unit. High quality, double sided,
printed circuit board construction is used, with solder mask and silk screened component reference designators.
All components are through-hole for easy assembly. NO toroids are required, and all controls and jacks are PCB mounted. The QRPometer can be constructed by beginners as well as experienced builders. Construction time is approximately 3 hours, depending on experience level. The only equipment required for calibration is a digital voltmeter, and a QRP transmitter..
All proceeds go to fund OzarkCon. As always, thank you for supporting the Four State QRP Group. http://www.4sqrp.com/
UPDATE: See comments–first run of these kits sold out within 27 hours! More to come later.
OzarkCon is a fun and informative QRP conference held every year in Branson, Missouri. This year, the conference is being held at the Stone Castle Hotel and Conference Center on April 13 and 14th. Registration and room rates are very reasonable.